/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.lvyh.lightframe.sharding.client.aop;

import com.lvyh.lightframe.sharding.client.annotations.MultiDatasource;
import com.lvyh.lightframe.sharding.client.context.MultiDataSourceHolder;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * Dynamic data source aspect
 *
 * @author lvyh 2021/03/20.
 */
@Aspect
public class MultiDatasourceAspect {
    private static final Logger logger = LoggerFactory.getLogger(MultiDatasourceAspect.class);

    @Pointcut("@annotation(com.lvyh.lightframe.sharding.client.annotations.MultiDatasource)")
    public void point() {

    }

    @Before("point()&&@annotation(multiDatasource)")
    public void before(MultiDatasource multiDatasource) throws Exception {
        if (MultiDataSourceHolder.getMultiDataSources().contains(multiDatasource.value())) {
            MultiDataSourceHolder.set(multiDatasource.value());
            logger.info("[RouteDatasourceAspect] reset current datasource：{}", multiDatasource.value());
        } else {
            //MultiDataSourceHolder.set("master");
            throw new Exception("datasource:" + multiDatasource.value() + " is invalid!");
        }
    }

    @After("point()")
    public void after() {
        logger.info("[RouteDatasourceAspect] clear current datasource：{}", MultiDataSourceHolder.get());
        MultiDataSourceHolder.remove();
    }
}
